TwinTurbo.NET: Nissan 300ZX forum - Pre cats were only designed/put in to prevent pollution
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Subject Pre cats were only designed/put in to prevent pollution
     
Posted by intel on December 13, 2010 at 10:03 AM
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In Reply To So your saying once the cars warmed up the pre cats have no posted by Z32TT-R on December 13, 2010 at 12:54 AM
     
Message until the main cats warmed up and were effective. As long as your car is properly warmed up you should do fine. Been about 5-6 years since we have had to pass emissions with any car pre-obd2 though in illinois. All I know is we had to get our older cars piping hot on the highway to get them to pass.

Then luckily they decided to be a broke state and stopped doing dyno roller tests and now just test if you have error codes with your obd2.

     
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